The adsorption ability of wood-based activated carbon to adsorb methylene blue (MB) and crystal violet (CV) from aqueous solution has been investigated. Adsorption studies were carried out on the batch experiment at different initial MB and CV concentrations (MB=150 mg/L～400 mg/L, CV=50 mg/L～350 mg/L), contact time, and temperature. The results showed that the MB and CV adsorption process followed the pseudo-second-order kinetic and intraparticle diffusion was the rate-limiting step. Adsorption equilibrium data of the adsorption process fitted very well to both Langmuir and Freundlich model. The maximum adsorption capacity (qm) by Langmuir constant was 416.7 mg/g for MB and 462.4 mg/g for CV. The thermodynamic parameters such as ΔH°, ΔS° and ΔG° were evaluated. The MB and CV adsorption process was found to be endothermic for the two dyes.

Abstract
 1. 서 론
 2. 재료 및 방법
  2.1. 실험 재료
  2.2. 실험 방법
 3. 결과 및 고찰
  3.1. 특성분석
  3.2. 흡착 시간에 따른 영향
  3.3. 흡착 속도 모델식
  3.4. 흡착 등온식
  3.5. 열역학적 해석
 4. 결 론
 참 고 문 헌

• 전진우(부경대학교 화학공학과) | Jin-Wo Jeon (Department of Chemical Engineering, Pukyong National University)
• 유해나(부경대학교 화학공학과) | Hae-Na Yu (Department of Chemical Engineering, Pukyong National University)
• 이민규(부경대학교 화학공학과) | Min-Gyu Lee (Department of Chemical Engineering, Pukyong National University) Corresponding author
• 감상규(제주대학교 환경공학과) | Sang-Kyu Kam (Department of Environmental Engineering, Jeju National University)